feat: add SEO descriptions to all pages and fix canonical URL

content/3.serveex/8.development/1.code-server.md

@@ -1,6 +1,7 @@
 --- 
 navigation: true
 title: Code-Server
+description: Install code-server to run VS Code in your browser from your homelab — mount folders and expose it securely with SWAG.
 main:
   fluid: false
 ---

content/3.serveex/8.development/2.gitea.md

@@ -1,6 +1,7 @@
 ---
 navigation: true
 title: Gitea
+description: Install Gitea, a lightweight self-hosted Git service to manage your code repositories privately on your own server.
 main:
   fluid: false
 ---

content/3.serveex/8.development/3.it-tools.md

@@ -1,6 +1,7 @@
 ---
 navigation: true
 title: IT Tools
+description: Install IT Tools, a self-hosted collection of handy utilities for developers — converters, encoders, formatters, and more.
 main:
   fluid: false
 ---